feat(education): complete Flyway migration and atomic submit

yudao-module-education/src/test/resources/sql/postgresql/clean.sql

@@ -0,0 +1,12 @@
+-- PostgreSQL persistence test cleanup.
+-- Module-owned Flyway creates the disposable schema; this only isolates test data.
+TRUNCATE TABLE
+    education_idempotency,
+    education_favorite,
+    education_wrong_question_idempotency,
+    education_wrong_question,
+    education_practice_report_detail,
+    education_practice_report,
+    education_practice_question,
+    education_practice_session
+    RESTART IDENTITY CASCADE;